<span class="searchmatch">collabōrābar</span> first-person singular imperfect passive indicative of collabōrō...
collabōrāre collabōrātur collabōrāmur collabōrāminī collabōrantur imperfect <span class="searchmatch">collabōrābar</span> collabōrābāris, collabōrābāre collabōrābātur collabōrābāmur collabōrābāminī...